You can only use each effect of "Merlin" once per turn. ●You can Tribute this card; Special Summon 1 "Noble Knight" monster from your Deck. You cannot Special Summon monsters the turn you activate this effect, except "Noble Knight" monsters. ●(Quick Effect): You can banish this card from your GY; immediately after this effect resolves, Synchro Summon 1 "Noble Knight" Synchro Monster using monsters you control. ●(Quick Effect): You can banish this card from your GY; immediately after this effect resolves, Xyz Summon 1 "Noble Knight" Xyz Monster using monsters you control.